Year	US Dollars adjusted for inflation)
1975	32000000
1977	3000000
1978	2000000
1981	2000000
1982	4000000
1984	2000000
1986	8000000
1987	12000000
1988	6000000
1989	6000000
1990	4000000
1991	10000000
1992	10000000
1994	1000000
1996	0
1997	7000000
2014	3000000
2017	0
2018	10000000
2021	14000000